Soil and water loss has been the most serious eco-environmental problem in the Three Gorges Reservoir Area of Chongqing.In this paper the authors studied the spatiotemporal features of soil and water loss from 1999 to...Soil and water loss has been the most serious eco-environmental problem in the Three Gorges Reservoir Area of Chongqing.In this paper the authors studied the spatiotemporal features of soil and water loss from 1999 to 2004 based on RS and GIS techniques.The results showed that:(1) The soil and water loss area decreased from 1999 to 2004.(2) Soil and water loss mainly exists in purple soil,yellow soil,limestone soil,paddy soil and yellow brown soil distributed areas.(3) The dry slope land and sparse woodland that are intensively influenced by human activities experienced most serious soil and water loss.(4) Soil and water loss in the study area indicated an obvious vertical differentiation characteristic.(5) There is a significant correlation between soil and water loss and slope.(6) There is no obvious correlation between soil and water loss and aspect.(7) Soil and water loss mainly exists in the values of R between 300 and 340 distribution area.The very-high soil and water loss has obvious correlation with R.展开更多
Purpose: So far, there have been few studies that discussed children’s reading environment in China’s poverty-stricken areas, this study aims to explore differences existed in extracurricular reading environment bet...Purpose: So far, there have been few studies that discussed children’s reading environment in China’s poverty-stricken areas, this study aims to explore differences existed in extracurricular reading environment between urban and rural children in Chongqing Reservoir Area with empirical evidence.Design/methodology/approach: Using a questionnaire survey, empirical data was collected from 105 participants. Then proposed hypotheses and the reliability of the observation variables were respectively examined with ANOVA and factor analysis. The statistical analysis software SPSS19.0 was used to analyze the data.Findings: Our results showed that 1) differences did exist in school and social reading environment between urban and rural children in Chongqing Reservoir Area; 2) differences in family reading environment between urban and rural children in Chongqing Reservoir Area were not obviously observed.Research limitations: The empirical data were collected from only one county of Chongqing Reservoir Area, which may have partially affected the generalization of our conclusions. In addition, the response rate of questionnaires was comparatively low due to a relatively limited research period. Practical implications: This study would provide some reference for governments, libraries, schools and families to consider how to jointly narrow the gap in the extracurricular reading circumstance between urban and rural children in Chongqing Reservoir Area.Originality value: This is one of the first studies to explore similarities and differences in extracurricular reading environment between urban and rural children in Chinese povertystricken areas, which will help research communities to gain a deeper understanding of children’s reading environment in Chinese Reservoir Area.展开更多
To explore geographical differences in quantitative characteristics and spatial pattern of human settlements environmental suitability （HSES） in the Three Gorges Reservoir Area （TGRA）, terrain, climate, hydrology,...To explore geographical differences in quantitative characteristics and spatial pattern of human settlements environmental suitability （HSES） in the Three Gorges Reservoir Area （TGRA）, terrain, climate, hydrology, vegetation and other natural factors were selected to build the livable environmental evaluation, and the quantitative analysis was conducted through Remote Sensing（RS） and Geographic Informational System （GIS） to reveal geo- graphical characteristics and spatial patterns of HSES. The results are obtained as follows： （1） inhabitants of the TGRA of Chongqing are concentrated in the area with moderate h.igh HSES, which is 78% of the total population distributed in 48% of the study area; （2） the HSES is closely related to the terrain, and it forms an arc-banded spatial succession pattern： relatively low in the northeast and the southeast while comparatively high in the west and the south; （3） large numbers of people are distributed in the area with low suitability （with higher population density than the average of the western China）, but economic development level in these areas is quite low. Moreover, these areas are ecological sensitive and fragile, many kinds of eco-environmental problems have been caused by human activities. Therefore, population migration and layout are reasonable options for the development of these areas.展开更多
基金National Natural Science Foundation of China,No.40801077Science & Technology Research Project Supported by Chongqing Municipal Education Commission,No.KJ070811+1 种基金Doctoral Fund of Chongqing Normal University,No.06XLB004Project by Chongqing Water Conservancy Bureau
文摘Soil and water loss has been the most serious eco-environmental problem in the Three Gorges Reservoir Area of Chongqing.In this paper the authors studied the spatiotemporal features of soil and water loss from 1999 to 2004 based on RS and GIS techniques.The results showed that:(1) The soil and water loss area decreased from 1999 to 2004.(2) Soil and water loss mainly exists in purple soil,yellow soil,limestone soil,paddy soil and yellow brown soil distributed areas.(3) The dry slope land and sparse woodland that are intensively influenced by human activities experienced most serious soil and water loss.(4) Soil and water loss in the study area indicated an obvious vertical differentiation characteristic.(5) There is a significant correlation between soil and water loss and slope.(6) There is no obvious correlation between soil and water loss and aspect.(7) Soil and water loss mainly exists in the values of R between 300 and 340 distribution area.The very-high soil and water loss has obvious correlation with R.
基金jointly supported by the Ministry of Education of China for the Returned Overseas Chinese Scholars(granted in 2012)the Educational Science Programmed Research Project of Chongqing(Grant No.:10-GJ-0234)
文摘Purpose: So far, there have been few studies that discussed children’s reading environment in China’s poverty-stricken areas, this study aims to explore differences existed in extracurricular reading environment between urban and rural children in Chongqing Reservoir Area with empirical evidence.Design/methodology/approach: Using a questionnaire survey, empirical data was collected from 105 participants. Then proposed hypotheses and the reliability of the observation variables were respectively examined with ANOVA and factor analysis. The statistical analysis software SPSS19.0 was used to analyze the data.Findings: Our results showed that 1) differences did exist in school and social reading environment between urban and rural children in Chongqing Reservoir Area; 2) differences in family reading environment between urban and rural children in Chongqing Reservoir Area were not obviously observed.Research limitations: The empirical data were collected from only one county of Chongqing Reservoir Area, which may have partially affected the generalization of our conclusions. In addition, the response rate of questionnaires was comparatively low due to a relatively limited research period. Practical implications: This study would provide some reference for governments, libraries, schools and families to consider how to jointly narrow the gap in the extracurricular reading circumstance between urban and rural children in Chongqing Reservoir Area.Originality value: This is one of the first studies to explore similarities and differences in extracurricular reading environment between urban and rural children in Chinese povertystricken areas, which will help research communities to gain a deeper understanding of children’s reading environment in Chinese Reservoir Area.
基金National Natural Science Foundation of China, No.40801077 Key Scientific Research Projects of the Ministry of Education, No.209100+1 种基金 Natural Science Foundation of Chongqing, No.CSTC, 2008BB7367 Science ＆ Technology Research Project Supported by Chongqing Municipal Education Commission, No.K J070811
文摘To explore geographical differences in quantitative characteristics and spatial pattern of human settlements environmental suitability （HSES） in the Three Gorges Reservoir Area （TGRA）, terrain, climate, hydrology, vegetation and other natural factors were selected to build the livable environmental evaluation, and the quantitative analysis was conducted through Remote Sensing（RS） and Geographic Informational System （GIS） to reveal geo- graphical characteristics and spatial patterns of HSES. The results are obtained as follows： （1） inhabitants of the TGRA of Chongqing are concentrated in the area with moderate h.igh HSES, which is 78% of the total population distributed in 48% of the study area; （2） the HSES is closely related to the terrain, and it forms an arc-banded spatial succession pattern： relatively low in the northeast and the southeast while comparatively high in the west and the south; （3） large numbers of people are distributed in the area with low suitability （with higher population density than the average of the western China）, but economic development level in these areas is quite low. Moreover, these areas are ecological sensitive and fragile, many kinds of eco-environmental problems have been caused by human activities. Therefore, population migration and layout are reasonable options for the development of these areas.
